Spray a 9×13 pan with non-stick olive oil spray. Mix in all the vegetables and pour the 3 tablespoons olive oil over the vegetables. Add the salt and pepper,mix put in oven and roast until nice and brown in a 350 degree oven for about an hour (mix a couple of times throughout the baking). Remove from the oven and mix in the orzo (the uncooked orzo) all the remaining spices , margarine and water to cover Return to the oven and bake for an hour.